// 全面解答 背景canvas动画
    //通用waves线条动画
    $(function() {
        function a() {
            var a = $(window).width(),
                b = (768 - a) / 768 + 1,
                c = 1;
            fmhPara = $(".feature-mi").height() < 641 || $(".feature-ai").height() < 641 || $(".feature-bi").height() < 641 ? 0 : 1, 768 > a ? ($(".mi-headline-bg").css("height", $(".feature-mi").height() + 28 * b * c + "px"), $(".ai-headline-bg").css("height", $(".feature-ai").height() + 28 * b * c + "px"), $(".bi-headline-bg").css("height", $(".feature-bi").height() + 28 * b * c + "px"), $(".ee-headline-bg").css("height", $(".feature-ee").height() + parseInt($(".feature-ee").css("padding-top")) + 20 * b + "px")) : ($(".mi-headline-bg").removeAttr("style"), $(".ai-headline-bg").removeAttr("style"), $(".bi-headline-bg").removeAttr("style"), $(".ee-headline-bg").removeAttr("style"))
        }
        setTimeout(function() {
            a()
        }, 100), $(window).resize(function() {
            a()
        })
    }), function(a, b) {
        "use strict";
        "function" == typeof define && "object" == typeof define.amd ? define([], function() {
            return b(a)
        }) : a.SineWaves = b(a)
    }(this, function() {
        "use strict";

        function a(a) {
            if (this.options = i.defaults(this.options, a), this.el = this.options.el, delete this.options.el, !this.el) return false; 
            if (this.ctx = this.el.getContext("2d"), this.waves = this.options.waves, delete this.options.waves, !this.waves || !this.waves.length) throw "No waves specified";
            this.dpr = window.devicePixelRatio || 1, this.updateDimensions(), window.addEventListener("resize", this.updateDimensions.bind(this)), this.setupUserFunctions(), this.easeFn = i.getFn(n, this.options.ease, "linear"), this.rotation = i.degreesToRadians(this.options.rotate), i.isType(this.options.running, "boolean") && (this.running = this.options.running), this.setupWaveFns(), this.loop()
        }
        function b(a, b) {
            return i.isType(a, "number") ? a : (a = a.toString(), a.indexOf("%") > -1 ? (a = parseFloat(a), a > 1 && (a /= 100), b * a) : a.indexOf("px") > -1 ? parseInt(a, 10) : void 0)
        }
        Function.prototype.bind || (Function.prototype.bind = function(a) {
            if ("function" != typeof this) throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
            var b = Array.prototype.slice.call(arguments, 1),
                c = this,
                d = function() {},
                e = function() {
                    return c.apply(this instanceof d && a ? this : a, b.concat(Array.prototype.slice.call(arguments)))
                };
            return d.prototype = this.prototype, e.prototype = new d, e
        });
        for (var c = ["ms", "moz", "webkit", "o"], d = 0; d < c.length && !window.requestAnimationFrame; ++d) window.requestAnimationFrame = window[c[d] + "RequestAnimationFrame"], window.cancelAnimationFrame = window[c[d] + "CancelAnimationFrame"] || window[c[d] + "CancelRequestAnimationFrame"];
        if (!window.requestAnimationFrame) {
            var e = 0;
            window.requestAnimationFrame = function(a) {
                var b = (new Date).getTime(),
                    c = Math.max(0, 16 - (b - e)),
                    d = window.setTimeout(function() {
                        a(b + c)
                    }, c);
                return e = b + c, d
            }
        }
        window.cancelAnimationFrame || (window.cancelAnimationFrame = function(a) {
            clearTimeout(a)
        });
        var f = Math.PI / 180,
            //原来的值为g=2 * Math.PI 用于修正sineinout右边的正弦值
            g = 2.6 * Math.PI,
            h = Math.PI / 2,
            i = {},
            j = i.isType = function(a, b) {
                var c = {}.toString.call(a).toLowerCase();
                return c === "[object " + b.toLowerCase() + "]"
            },
            k = i.isFunction = function(a) {
                return j(a, "function")
            },
            l = i.isString = function(a) {
                return j(a, "string")
            },
            m = (i.isNumber = function(a) {
                return j(a, "number")
            }, i.shallowClone = function(a) {
                var b = {};
                for (var c in a) a.hasOwnProperty(c) && (b[c] = a[c]);
                return b
            }),
            n = (i.defaults = function(a, b) {
                j(b, "object") || (b = {});
                var c = m(a);
                for (var d in b) b.hasOwnProperty(d) && (c[d] = b[d]);
                return c
            }, i.degreesToRadians = function(a) {
                if (!j(a, "number")) throw new TypeError("Degrees is not a number");
                return a * f
            }, i.getFn = function(a, b, c) {
                return k(b) ? b : l(b) && k(a[b.toLowerCase()]) ? a[b.toLowerCase()] : a[c]
            }, {});
        n.linear = function(a, b) {
            return b
        }, n.sinein = function(a, b) {
            return b * (Math.sin(a * Math.PI - h) + 1) * .5
        }, n.sineout = function(a, b) {
            return b * (Math.sin(a * Math.PI + h) + 1) * .5
        }, n.sineinout = function(a, b) {
            return b * (Math.sin(a * g - h) + 1) * .5
        };
        var o = {};
        o.sine = function(a) {
            return Math.sin(a)
        }, o.sin = o.sine, o.sign = function(a) {
            return a = +a, 0 === a || isNaN(a) ? a : a > 0 ? 1 : -1
        }, o.square = function(a) {
            return o.sign(Math.sin(a * g))
        }, o.sawtooth = function(a) {
            return 2 * (a - Math.floor(a + .5))
        }, o.triangle = function(a) {
            return Math.abs(o.sawtooth(a))
        }, a.prototype.options = {
            speed: 10,
            rotate: 0,
            ease: "Linear",
            wavesWidth: "95%"
        }, a.prototype.setupWaveFns = function() {
            for (var a = -1, b = this.waves.length; ++a < b;) this.waves[a].waveFn = i.getFn(o, this.waves[a].type, "sine")
        }, a.prototype.setupUserFunctions = function() {
            i.isFunction(this.options.resizeEvent) && (this.options.resizeEvent.call(this), window.addEventListener("resize", this.options.resizeEvent.bind(this))), i.isFunction(this.options.initialize) && this.options.initialize.call(this)
        };
        var p = {
            timeModifier: 1,
            amplitude: 50,
            wavelength: 50,
            segmentLength: 10,
            lineWidth: 1,
            strokeStyle: "rgba(255, 255, 255, 0.2)",
            type: "Sine"
        };
        return a.prototype.getDimension = function(a) {
            return i.isNumber(this.options[a]) ? this.options[a] : i.isFunction(this.options[a]) ? this.options[a].call(this, this.el) : "width" === a ? this.el.clientWidth : "height" === a ? this.el.clientHeight : void 0
        }, a.prototype.updateDimensions = function() {
            var a = this.getDimension("width"),
                c = this.getDimension("height");
            this.width = this.el.width = a * this.dpr, this.height = this.el.height = c * this.dpr, this.el.style.width = a + "px", this.el.style.height = c + "px", this.waveWidth = b(this.options.wavesWidth, this.width), this.waveLeft = (this.width - this.waveWidth) / 2, this.yAxis = this.height / 2
        }, a.prototype.clear = function() {
            this.ctx.clearRect(0, 0, this.width, this.height)
        }, a.prototype.time = 0, a.prototype.update = function(a) {
            this.time = this.time - .007, "undefined" == typeof a && (a = this.time);
            var b = -1,
                c = this.waves.length;
            for (this.clear(), this.ctx.save(), this.rotation > 0 && (this.ctx.translate(this.width / 2, this.height / 2), this.ctx.rotate(this.rotation), this.ctx.translate(-this.width / 2, -this.height / 2)); ++b < c;) {
                var d = this.waves[b].timeModifier || 1;
                this.drawWave(a * d, this.waves[b])
            }
            this.ctx.restore(), b = void 0, c = void 0
        }, a.prototype.getPoint = function(a, b, c) {
            var d = a * this.options.speed + (-this.yAxis + b) / c.wavelength,
                e = c.waveFn.call(this, d, o),
                f = this.easeFn.call(this, b / this.waveWidth, c.amplitude);
            return d = b + this.waveLeft, e = f * e + this.yAxis, {
                x: d,
                y: e
            }
        }, a.prototype.drawWave = function(a, b) {
            b = i.defaults(p, b), this.ctx.lineWidth = b.lineWidth * this.dpr, this.ctx.strokeStyle = b.strokeStyle, this.ctx.lineCap = "butt", this.ctx.lineJoin = "round", this.ctx.beginPath(), this.ctx.moveTo(0, this.yAxis), this.ctx.lineTo(this.waveLeft, this.yAxis);
            var c, d;
            for (c = 0; c < this.waveWidth; c += b.segmentLength) d = this.getPoint(a, c, b), this.ctx.lineTo(d.x, d.y), d = void 0;
            c = void 0, b = void 0, this.ctx.lineTo(this.width, this.yAxis), this.ctx.stroke()
        }, a.prototype.running = !0, a.prototype.loop = function() {
            this.running === !0 && this.update(), window.requestAnimationFrame(this.loop.bind(this))
        }, a.prototype.Waves = o, a.prototype.Ease = n, a
    }), $(function() {
        var a = new SineWaves({
                el: document.getElementById("waves"),
                //设置正弦波速度
                speed: 4,
                width: function() {
                    var a = $(document).width();
                    //原来的值, 设置正弦波的宽度, 现在设置为与元素同宽
                    //return 768 > a ? 3 * $("#waves").parent().width() : 1.4 * $("#waves").parent().width()
                    return 1.4 * $("#waves").parent().width()
                },
                height: function() {
                    return $("#waves").parent().height()
                },
                //原来的值, 可以正弦波宽度, 居中, 两边超出部分隐藏
                //wavesWidth: "100%",
                wavesWidth: "130%",//150
                ease: "SineInOut",
                waves: [{
                    timeModifier: .5,
                    lineWidth: 2,
                    amplitude: 150,
                    wavelength: 200,
                    segmentLength: 1
                }, {
                    timeModifier: .5,
                    lineWidth: 2,
                    amplitude: 100,
                    wavelength: 150,
                    segmentLength: 1
                }, {
                    timeModifier: .5,
                    lineWidth: 2,
                    amplitude: 50,
                    wavelength: 80,
                    segmentLength: 1
                }],
                initialize: function() {},
                resizeEvent: function() {
                    var a = this.ctx.createLinearGradient(0, 0, this.width, 0);
                    //原来的值, 设置线条渐变透明度, 以及开始激变的位置
                    //a.addColorStop(0, "rgba(255, 255, 255, 0)"), a.addColorStop(.5, "rgba(255, 255, 255, 0.2)"), a.addColorStop(1, "rgba(255, 255, 255, 0)");
                    a.addColorStop(0, "rgba(255, 255, 255, 0)"), a.addColorStop(.1, "rgba(255, 255, 255, 0.2)"), a.addColorStop(1, "rgba(255, 255, 255, 0)");
                    for (var b = -1, c = this.waves.length; ++b < c;) this.waves[b].strokeStyle = a;
                    b = void 0, c = void 0, a = void 0
                }
            }),
            b = $("#waves"),
            c = $(document).scrollTop(),
            d = $(document).scrollTop() + $(window).height(),
            e = b.offset().top + b.height(),
            f = b.offset().top;
        (c > e || f > d) && (a.running = !1, a.update()), $(window).bind("scroll", function() {
            c = $(document).scrollTop(), d = $(document).scrollTop() + $(window).height(), e = b.offset().top + b.height(), f = b.offset().top, c > e || f > d ? (a.running = !1, a.update()) : (a.running = !0, a.update())
        })
    });